Servlet + JSP（Netbeans）：请求的资源不可用

Question

美好的一天。 我的JSP Web系统有问题，我正在寻求有关传输功能的帮助。

基本上，传输按钮就像一个停用按钮，单击后，它将传输状态（在我的SQLdb中称为dsTransmit）从“待处理”更改为“无效”。 我已经复制了我为删除所做的代码，并进行了一些改动，这很正常。

但是，当我在“发送”按钮上执行操作时，它不会转发要更新的数据。 但是，它发送此错误。

类型状态报告，消息未找到，描述请求的资源不可用。

请注意，我正在使用Glassfish服务器和Netbeans。

这是我的代码

DataAccess.java

  public void transmit(int id){ try { String sql = "UPDATE DailySales SET transmit = 'approved' where dsId = ? "; PreparedStatement ps = DBUtils.getPreparedStatement(sql); ps.setInt(1, id); ps.executeUpdate(); } catch (ClassNotFoundException | SQLException ex) { Logger.getLogger(DataAccess.class.getName()).log(Level.SEVERE, null, ex); } } 

Transmit.java

 /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package servlet; import dao.DataAccess; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * * @author Thang */ public class Transmit extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String idTemp = request.getParameter("id"); int id = Integer.parseInt(idTemp); DataAccess da = new DataAccess(); da.transmit(id); response.sendRedirect("/CRUD_News/AllPost"); } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> } 

web.xml中

 <?xml version="1.0" encoding="UTF-8"?> <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"> <servlet> <servlet-name>EditPost</servlet-name> <servlet-class>servlet.EditPost</servlet-class> </servlet> <servlet> <servlet-name>DeletePost</servlet-name> <servlet-class>servlet.DeletePost</servlet-class> </servlet> <servlet> <servlet-name>Transmit</servlet-name> <servlet-class>servlet.Transmit</servlet-class> </servlet> <servlet-mapping> <servlet-name>EditPost</servlet-name> <url-pattern>/edit</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>DeletePost</servlet-name> <url-pattern>/delete</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Transmit</servlet-name> <url-pattern>/transmit</url-pattern> </servlet-mapping> <session-config> <session-timeout> 30 </session-timeout> </session-config> </web-app> 

AllPost.jsp（我用于发送功能的按钮）

  <center><a href="transmit?id=${p.id}" class="btn btn-default" onclick="return confirm('Are you sure you want to transmit this?');">Transmit</a></center> 

有人可以指出我在这里想念的东西吗？

Answer 1

它对我有用您可以显示您的项目吗？

 <a href="transmit?id=${p.id}> ==> <a href=" transmit.do?id=${p.id} <servlet-mapping> <servlet-name>Transmit</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>